<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        let s=''
        for(let i=1; i<=9; i++){
            for(let j=1; j<=i; j++){
                // 1*2
                s+=j+'*'+i+'='+j*i+'\t'
            }
          s+='\n'
        }
        console.log(s)
    </script>
</body>
</html>